I really liked this on the Touch, so decided to give this one a try. It's the same game, with some nice additions. Faceplace is like a Facebook page where the characters update their thoughts or what they are doing. Gives a little extra fun to the story.
I think the downloadable content is the same as the standard def game, but I am not 100% for sure about that. The new features (Faceplace and the Decision Tree) need to be part of the story content, and it did not appear the DLC has those features in them yet.